diff --git a/sml/include/sml/sml_number.h b/sml/include/sml/sml_number.h
index 41b95db..6f1400f 100644
--- a/sml/include/sml/sml_number.h
+++ b/sml/include/sml/sml_number.h
@@ -37,6 +37,8 @@ void *sml_number_parse(sml_buffer *buf, unsigned char type, int max_size);
 //void sml_number_write(unsigned char type, int size, u64 value, sml_buffer *buf);
 void sml_number_write_new(void *np, unsigned char type, int size, sml_buffer *buf);
 
+void sml_number_free(void *np);
+
 #define sml_u8_init(n) (u8 *) sml_number_init(n, SML_TYPE_UNSIGNED, SML_TYPE_NUMBER_8)
 #define sml_u16_init(n) (u16 *) sml_number_init(n, SML_TYPE_UNSIGNED, SML_TYPE_NUMBER_16)
 #define sml_u32_init(n) (u32 *) sml_number_init(n, SML_TYPE_UNSIGNED, SML_TYPE_NUMBER_32)
diff --git a/sml/src/sml_number.c b/sml/src/sml_number.c
index 34455c0..683fa44 100644
--- a/sml/src/sml_number.c
+++ b/sml/src/sml_number.c
@@ -129,3 +129,9 @@ int sml_number_endian() {
 		return SML_BIG_ENDIAN;
 }
 
+void sml_number_free(void *np) {
+	if (np) {
+		free(np);
+	}
+}
+